### What problem does this PR solve?

cover [download docments
endpoints](https://ragflow.io/docs/dev/http_api_reference#download-document)

### Type of change

- [x] add test cases

### What problem does this PR solve?

update test cases per issue #5920 #5923

### Type of change

- [x] update test case

### What problem does this PR solve?

cover upload docments endpoints

### Type of change

- [x] add test cases

### What problem does this PR solve?

Remove unstable assertion introduced in PR #5924

### Type of change

- [x] update test cases

### What problem does this PR solve?

Fixes #5923 

Fixes the readonly variables from payload at
 /datasets/<dataset_id> 

_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._

Now if user tries to modify readonly values then it will show " The
input parameters are invalid. "

invalid_keys = {"id", "embd_id", "chunk_num", "doc_num", "parser_id",
"create_date", "create_time", "created_by",
"status","token_num","update_date","update_time"}
    if any(key in req for key in invalid_keys):
return get_error_data_result(message="The input parameters are
invalid.")
i have include those readonly keys in invalid_keys

### Type of change

- [ ] Bug Fix (non-breaking change which fixes an issue)

---------

Co-authored-by: Raghav <2020csb1115@iitrpr.ac.in>

### What problem does this PR solve?

cover dataset update endpoints

### Type of change

- [x] Add test cases

### What problem does this PR solve?

update test cases per PR #5748 #5878  issue #5709 

### Type of change

- [x] update test cases

### What problem does this PR solve?

update test cases per PR https://github.com/infiniflow/ragflow/pull/5778

### Type of change

- [x] update test cases

### What problem does this PR solve?

 Update test cases per PR #5755

### Type of change

- [x] update test cases

### What problem does this PR solve?

cover dataset list endpoints

### Type of change

- [x] Add test cases

### What problem does this PR solve?

1. cover dataset deletion endpoints
2. format code with ruff

### Type of change

- [x] add testcases
- [ ] style

### What problem does this PR solve?

#5719

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

### What problem does this PR solve?

1. add test cases
2. integrate workflows/tests.yml into CI pipeline

### Type of change

- [x] add testcases